http://rje.orgArxivləşdirilib 2020-11-11 at the Wayback Machine Bernard Caillaud and Bruno Jullien (2003). "Chicken & Egg: Competing Matchmakers". RAND Journal of Economics 34(2) 309–328.
http://rje.orgArxivləşdirilib 2020-11-11 at the Wayback Machine Bernard Caillaud and Bruno Jullien (2003). "Chicken & Egg: Competing Matchmakers". RAND Journal of Economics 34(2) 309–328.